Learning python: Using strings in lists in functions

gistfile1.py

# Define a function called join_strings accepts an argument called words. It will be a list.
# Inside the function, create a variable called result and set it to "", an empty string.
# Iterate through the words list and append each word to result.
# Finally, return the result.
# Don't add spaces between the joined strings!

n = ["Michael", "Lieberman"]

def join_strings(words):
    result = ""
    for i in range(0, len(words)):
        result = result + words[i]
    return result
print join_strings(n)


## Create a function that joins two lists together.
## Define a function called join_lists that has two arguments, x and y. They will both be lists.
## Inside that function, return the result of concatenating x and y together.


m = [1, 2, 3]
n = [4, 5, 6]

def join_lists(x,y):
    return x + y

print join_lists(m, n)
# You want this to print [1, 2, 3, 4, 5, 6]







n = [[1, 2, 3], [4, 5, 6, 7, 8, 9]]

def flatten(lists):
    results = []
    for numbers in lists:
        for i in numbers:
            results.append(i)
    return results
print flatten(n)